from django.db import models
class BaseModel(models.Model):
    """为模型类补充字段"""
    create_time = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
    update_time = models.DateTimeField(auto_now=True, verbose_name="更更新时间")
    class Meta:
        abstract = True  # 说明是抽象模型类, ⽤用于继承使⽤用，数据库迁移时不不会创建BaseModel的表
